Air purifier



FIG. 1 is a front perspective view of an air purifier showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a right-side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is an enlarged front perspective view of the portion 8 encircled in FIG. 1;

FIG. 9 is an enlarged front perspective view of the portion 9 encircled in FIG. 1; and,

FIG. 10 is an enlarged front perspective view of the portion 10 encircled in FIG. 1.

The broken lines in the drawings illustrate portions of the air purifier that form no part of the claimed design.

The dot-dash broken lines in the drawings encircle portions of the claimed design that are illustrated in enlargements and form no part of the claimed design. 

CLAIM The ornamental design for an air purifier, as shown and described. 